A False Sense of Hypoglycemia

One of the most important diabetes supplies is your glucose meter.

By Nora Saul, M.S., R.D., C.D.E., Manager of Nutritional Services at Joslin

Hypoglycemia is defined as a blood glucose level below 70mg/dl. But many people find that they feel the symptoms of low blood glucose at levels much higher than expected.  Some patients have come into my office reporting getting sweaty, hungry and tachycardic at levels in the mid 130s.

Symptoms of hypoglycemia are individual, but may include extreme hunger, nervousness, excessive perspiration, rapid heartbeat (tachycardia), headache, fatigue, mood changes, blurred vision and difficulty concentration and completing mental tasks. Extremely low glucose levels can lead to disorientation and convulsions.

People who take insulin or some oral medications that cause the pancreas to produce insulin are usually prone to episodes of hypoglycemia.  This is especially true if they are attempting to keep their glucose level as close to normal as possible.  But, people in poor control can also have hypoglycemic reactions as they swing from high to low glucose levels.

False hypoglycemia is usually due to one of two causes. The first can be compared to an incorrectly programmed thermostat. If you usually keep your room at a steamy 85 degrees, 70 degrees might start to feel chilly.

People whose blood glucose is often high trick their body into thinking this is normal. If they rapidly bring their blood glucose into the normal range their bodies’ trigger the same autonomic and neurological warnings as if their blood glucose had fallen into the danger zone.

Gradually bringing yourself into better control will help accustom your body to lower blood glucose levels.

The other cause of pseudo-hypoglycemia occurs when glucose levels drop rapidly in a short time period. This can happen when exercising vigorously and can occur even in those in good control.

The first thing to do when you experience manifestations of hypoglycemia is to confirm the diagnosis with the use of your meter. If you really are in a danger zone, the appropriate treatment for low blood glucose is to take 15 grams of an easily absorbable carbohydrate, wait 15 minutes and then recheck.  If the glucose level hasn’t reached 80mg/dl then a second carbohydrate load is indicated.

But what should you do if your meter says 110 mg/dl and you have already checked twice? The first thing is to relax. Knowing you are not having a low blood glucose reaction and there is no urgency to do anything should help reduce your anxiety. And then you can decide if you are capable of “waiting it out” knowing you will feel better in time.

If that isn’t possible, then take a small amount of carbohydrate to relieve symptoms.  For example, you may decide to see if 5 grams of carbohydrate (the amount in one glucose tab or 1 teaspoon of sugar) will alleviate your discomfort without causing your blood glucose levels to skyrocket.


  1. It’s important to note that there is a monogenic form of diabetes, MODY 2, in which hypoglycemia does really occur at a higher level than indicated. With MODY 2, the body is programmed to run at a higher baseline fasting glucose (about 30-40 mg/dl higher than the typical 70-100 mg/dl that’s considered “normal” for most), and the counter-regulatory responses to hypoglycemia (release of epinephrine and glycogen from the liver) occur in the 90’s as opposed to the 60’s for others.

  2. Sometimes I’ve noticed that I’ve just dropped too fast….my novolog really did it’s job (when I’m going from 220 to 118 in 30 minutes at insulin peak) What helps for me when I’m 100 and dizzy and hungry after is to eat something with carbs fat protein but take the amount of insulin to keep it in target (peanut butter and jelly on 1 slice of toast plus insulin). Then I’m not yoyoing but the madness stops.

  3. I’ve lived with hypoglycemia all my life as everyone in my family has but I’ve never had a meter. After yesterday I know now that I must get one. I have had mild attacks where I would get a little shaky and feel extremely hungry and get cranky that I would easily fix with eating. I’ve now had two major attacks in my life. The first one I had no access to a meter to be able to say how low it got, but I would up passing out for a minute. I wound up recovering slowly, but safely. Yesterday was another case of an attack but once again I didn’t have access to a meter until I had already risen my blood sugar. I was at work checking out a customer when I started to get sweaty and a feeling that I was going to puke. I knew immediately that it was because I didn’t eat breakfast due to ruining late. Stupid of me, I know. I tried to just make it through until my break but it got progressively worse very quickly. I was sure that I was about to pass out. I called over my manager and was told that I looked pale and should go rest. I went to the bathroom immediately without anything happening and the feeling getting worse. I then went straight for food and a protein shake. After awhile I thought that I might be feeling better and tried to get back to work. The second I stood up it all came back. I thought that maybe it was just taking longer than usual to fix and continued to work. I had to stop again with the feeling of about to pass out or puke. This went on for an hour until my boss came up and told me to go to the pharmacy in our store to get my blood sugar tested. I had no idea that we could do that. I went straight over and got a reading of 82. Normally this is fine but in this case a bit concerning after I had eaten and had given it time to set. I was told to buy the tablets and eat a couple and to come back in 15. The next reading was the same. We began to wonder if the meter was reading correctly so we took another of the same blood spot and it came up as 71. I was then told to eat more tablets and drink some juice. After another 15 and feeling no different I went to the doctors. An hour later and it was up to 140. The rest of my day I spent laying on the couch feeling horrible and exhausted. I never want to go through that again.

    • My husband goes through that where his sugars drop and he almost or has passed out and convulsed. He drank a pepsi and that brought his sugars up but he felt so crappy the rest of the night and next day. It is so hard on your body.

  4. Ive been having these episodes almost daily for 2 weeks. I had a couple days where it didnt happen at all, but i get hungry, shaky, sweaty, weird vision etc. Took the 3 hour sugar test and it came back positive for hypoglycemia. My 4th and final reading was at apparently at 60. I check my meter all the time to the point it annoys my wife and it’s never been under 79. typically its 82, 84, 94, 92, 102. I’ve also had high anxiety and depression my whole life and i wonder if this is happening because of that? The symptoms are almost exactly the same so i have a hard time telling the difference. I’ve ready to drink juice or eat sugar, but my doctor called me this morning and said AVOID all simple sugar and juices. I was massively confused as i thought thats what diabetics had to do. I thought i need sugar. Turns out, i guess, i need protein, complex carbs and fat. I’m so confused and a little scared. Seems that its rare for people to have just hypoglycemia

  5. Hypoglycemia the forgotten sugar disorder. I am waiting on my results of a 3 hour test. Although I am very sad because my sugar didn’t drop therefore doctor would probably say I have nothing and it is anxiety. I just had a low episode with 82. Felt horrible and my mom was telling your sugar is fine. But I feel horrible at 82. It so scary it makes me very depressed and I don’t want to do anything or go anywhere because I am afraid. I else have a baby boy and I am so scare for him. I whish science gets into searching hypoglycemia more and find a cure. I’m sorry we have to go through this

  6. I have symptoms at 82 as well, sometimes at 92 even. I had no idea this was my problem until a week ago and I have been tracking it since then. My blood sugar level drops after I eat from 110 to about 82 and I feel terrible. thank you for the information, I do hope to find more answers and that there is more research done on this particular problem.

  7. I had symptoms at 99 today after coming home from the gym and eating dinner. Just a protein and veggie (On a diet, to lose weight) I was lightheaded, weak, really tired and a little shaky. I’m not sure if i should add a little carb after my workout from now on or not. It’s a little frustrating trying to count every calorie and then have to eat more so i don’t feel like I’m going to pass out. But I did a pretty intense workout at the gym today, and this has happened before after working out really hard and then not eating any carbs after. I was in the 80’s those times. I’m glad I found this blog post because I was freaking out a little. At least now I know I’ll be okay and it will pass.

    • As a diabetic, always include carbs in your meals and snacks. Carbs turn into sugar, which is what our bodies use for energy. Ask for a referral to a diabetes educator and nutritionist. Learn how to read food labels, so that you won’t experience the extreme lows and highs.

  8. Ladies, you are not alone. My average post meal Blood Sugar numbers were in the 240s and after exercising and playing sport and fasting to reduce weight and blood pressure, my post meal numbers are now in the 150s. Usually it is hard to get my body to get the blood sugar count low even after hours of eating, but after fasting, my diabetes reversed and I am seeing good results. Since my body is used to working with very high sugar levels, now this improvement in the sugar numbers is not well tolerated by my body. I have severe hypo symptoms even when the blood sugar is at 100. My entire body shakes inside, I feel dizzy and feel like I am going to pass out and fain and feel very tired and weak and feverish. Since it was already feeling the symptoms of low sugar, I did not take the Metformin. Turns out that when I took metformin, the symptoms went away. Those of you who experience hypo symptoms even when your blood sugar numbers are above 100, try a small dose of Metformin. It helps your body utilize it’s own insulin well.

  9. I have having the same issue for the couple of weeks I feel hypoglycaemia but blood glucose level is fair. It doesn’t happened previously of my 3 years diabetes career. This situation is very confusing my inside body shakes. But I cannot feel hungry. What to do

  10. Hi!
    I am have more or less the same problem. I have been diagnosed with type 1 diabetes 4 years ago… and i’ve had the first hypo crisis (i just fainted with convulsions) almost one year ago. After this, i started to pay more attention to this. but a lot of times i got fake hypo symptoms. One week ago i got the second one, just woke up from sleep, had the time to take some sugar – convulsions and fainted. After this second episode, i have the feeling all the time that i’m in hypo. And a big problem is that i cannot measure normally my bloodsugar, as in my country they are pretty expensive, and cannot afford them. For the past week i am really stressed out…and affraid even to go out for a walk…What do you think should i do?

    • I think you should make sure that you eat every three hours. Breakfast, snack, lunch, snack, dinner, snack. Make sure you eat before bed. If you have hypo episodes in the morning before breakfast, go to sleep with your sugar at around 130, so that it won’t be low in the morning. I use to eat peanut butter and crackers, Graham crackers, or a half sandwich before bed. Try to meal prep and have your meals ready to eat. Keep healthy snacks. Apples, popcorn,string cheese ,boiled eggs, yogurt peanut butter, berries, fiber one bars or protein bars. Eating healthy meals and snacks every 3-4 hours will eliminate the lows.

    • Valentin, if you can get me your mailing address I will send you a meter and a years worth of test strips. I can get them inexpensively. We can work it out.

  11. Hello everyone,
    I have had a hell of a past four weeks. Had type 1 diabetes since I was seven (coming up 20 years on Christmas day) and i’ve always struggled to bring them into a lower range. Recently have had waves of fainting, nausea, internally vibrating and shaking, panic, tired and weak muscles and limbs and chills. Have collapsed, but not fainted with blood pressure drops, twice in the past four weeks as well.
    Have been to the hospital and seen a bunch of drs only to have them put me on a heart monitor and sending me off to get looked at for epilepsy but with them raising doubts about it being related to those.
    I did not actually know this could be a thing. All the symptoms and episodes other describe seem similar, if not exact to my own. I often have them around morning, lunch time and over night.
    I am pretty much becoming an insomniac due to not being able to relax and fall asleep due to a (becoming quite constant) hypo feeling/s when not hypoing. I check regularly my BGL’s and am often in a safe range to a bit higher. Even during episodes.
    I just wanted to drop a msg and ask if anyone improved from this after gaining better management of their BGL’s? I am trying very hard to improve my diabetic care right now and have started eating more regularly and on time.
    The next thing the drs want to test for is MS and I am a little afraid of that becoming a thing for me.

    Thank you so kindly for any feedback.

  12. My grand father has type 2 DM. His blood sugar is under poor control and always high. He feels hungry even though blood sugar is over 11 mmol/L. If like that situation, should he eat some snack???

    Thank you.

  13. My daughter is 14 and has had all day dizzy spells, cold sweats, headaches and severe energy depletion. She was an extremely active volleyball player and now she needs help walking. Her dr checked it and she was at 129. They said little high but ok. Then my aunt saw her and she was behaving like a drunk person. We started checking her blood sugar and notice her “i feel normal” is 100. Is that normal? I was told she should be fine at 80 but she is not.

  14. I’m not diabetic, but have had the hypo symptoms for 20+ years. My blood sugar has always been around 78-92 during the hypo episodes. I went to see some endocrinologists, but I have been told that there was nothing wrong with me.

    Last Thursday, I eat a small meal before I went gym, after I fast walked about only 30 minutes, I felt exhausted and started to “sweat”. I could not believe it’s a hypo attack (since I just eat a half hour ago), but I felt so weak, shaky, and fainting. I lay down on the floor, pushed three chocolate candies down to my throat. After waiting about 30 minutes, I tried to standing up, but still had a fainting feeling. Then, the people there drove me to a close ER.

    The ER nurse checked my blood sugar, was 94 (after eating three chocolate candies). She asked me to drink two small containers orange juice, after two house she checked it again, despite of feeling better after drinking the orange juice, my blood sugar was down to 78. The doctor said everything was normal, and the diagnosis was: syncope.

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